Since the x86 binary is only useful for 10.4, would it make sense to
simply remove

the x86 binary, and be done with all the questions?

This won't solve the problem, since only the command line interface
works, not the menus and so on, that are described in the Tutorial.
Also, it would create new problems for the people that still run 10.4
with Intel architecture.
Much better is just to add a note at the download page.
/Mats